Fix memory errors from drawing large map

Include techdemo mission followtheleader.cpn
cxong · Sep 13, 2013 · d3d28f2 · d3d28f2
1 parent 3bde5ad
commit d3d28f2
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Showing 5 changed files with 7 additions and 1 deletion.
diff --git a/missions/techdemo/followtheleader.cpn b/missions/techdemo/followtheleader.cpn
diff --git a/src/cdogs/draw.c b/src/cdogs/draw.c
@@ -239,7 +239,7 @@ void DrawFloor(DrawBuffer *b, int xOffset)
 			 x < b->width;
 			 x++, tile++, pos.x += TILE_WIDTH)
 		{
-			if (PicIsNotNone(tile->pic) &&
+			if (tile->pic != NULL && PicIsNotNone(tile->pic) &&
 				!(tile->flags & (MAPTILE_IS_WALL | MAPTILE_OFFSET_PIC)))
 			{
 				BlitMasked(

diff --git a/src/cdogs/draw_buffer.c b/src/cdogs/draw_buffer.c
@@ -102,6 +102,10 @@ void DrawBufferSetFromMap(
 			{
 				*bufTile = map[y][x];
 			}
+			else
+			{
+				*bufTile = tileNone;
+			}
 		}
 		bufTile += tilesXY.x - buffer->width;
 	}

diff --git a/src/cdogs/map.c b/src/cdogs/map.c
@@ -79,6 +79,7 @@
 #define MAP_ACCESSBITS      0x0F00
 
 
+Tile tileNone = { NULL, { { 0, 0 }, { 0, 0 }, NULL }, 0, 0, NULL };
 Tile gMap[YMAX][XMAX];
 
 

diff --git a/src/cdogs/map.h b/src/cdogs/map.h
@@ -119,6 +119,7 @@ typedef struct
 	TTileItem *things;
 } Tile;
 
+extern Tile tileNone;
 extern Tile gMap[YMAX][XMAX];
 #define Map( x, y)  gMap[y][x]
-Original file line number
+Diff line change
@@ Expand Up / @@ -102,6 +102,10 @@ void DrawBufferSetFromMap( @@
     			{
     				*bufTile = map[y][x];
     			}
+    			else
+    			{
+    				*bufTile = tileNone;
+    			}
     		}
     		bufTile += tilesXY.x - buffer->width;
     	}
@@ Expand Down @@
Original file line number	Diff line number	Diff line change
Expand Up		@@ -79,6 +79,7 @@
		#define MAP_ACCESSBITS 0x0F00


		Tile tileNone = { NULL, { { 0, 0 }, { 0, 0 }, NULL }, 0, 0, NULL };
		Tile gMap[YMAX][XMAX];


Expand Down